Merge pull request #2276 from github/koesie10/markdown-lint-ci

Add markdownlint to CI

Author: koesie10

.github/workflows/main.yml

@@ -100,6 +100,11 @@ jobs:
         run: |
           npm run lint
 
+      - name: Lint Markdown
+        working-directory: extensions/ql-vscode
+        run: |
+          npm run lint:markdown
+
       - name: Lint scenarios
         working-directory: extensions/ql-vscode
         run: |